Television antenna



May 13, 1952 M. D, ERCOLINO TELEVISION ANTENNA 2 SHEETSSHEET 1 Filed May25, 1950 fur/enter QErcoZino May 13, 1952 ERCQLlNO 2,596,389

TELEVISION ANTENNA Filed May 25, 1950 2 SHEETS-SHEET 2 ATTORNEYSPatentecl May 13, 1952 UNITED STATES PATENT OFFICE 2,596,389 TELEVISIONANTENNA Michael D. Ercolino, Wanamassa, N. J.

Application May 23, 1950, Serial No. 163,717

1 Claim. 1

This invention relates to television antennas and more particularly aclosed ended conical dipole type of antenna assembly carried by aselfsupporting mount adapted for use within a buildmg.

The conical type of antenna has become well recognized as having highgain characteristics making it efliciently responsible for any wide bandapplication to which it is suitably dimensioned. However, theconventional construction of a conical receiving antenna andparticularly a stacked array requires a relatively large heavy assemblythat must be well supported and firmly fixed on a roof or a specialsupporting tower. Such construction is not always feasible at the siteof the receiver either due to lack of space or due to restrictionsprohibiting the erection of an outside antenna.

The present invention overcomes these difficulties by providing antennaconstruction wherein a stacked conical array is made self-supporting andready of assembly in the loft of a building or like space enabling theantenna to be completely concealed and supported by ordinary floor orsimilar building construction,

It is therefore an object of this invention to provide an antennaassembly that is self-supporting and ready of assembly.

Another object is to provide an antenna array for receiving very highfrequency, ultra-high frequency, and higher frequencies ofelectromagnetic waves comprising a correlated reflector and closed endedconical dipoles capable of being an gularly adjusted.

A further object is to provide an antenna that is simple and inexpensiveof construction capable of favoring desired signals from one directionwhile excluding signals from other directions.

A still further object is to provide an antenna so designed that itinherently provides a satisfactory match to a conventional transmissionline of either the twin lead or coaxial type.

With these and other objects in view that may appear as the descriptionproceeds, the invention consists in the novel arrangement of cooperatingparts as hereinafter more specifically set forth, claimed, and shown inthe drawings in which like numbers refer to like parts in the differentviews.

In the drawings:

Figure l is a plan view of the present invention.

Figure 2 is an end elevation.

Figure 3 is a side elevation taken on line 3-5 of Figure 2 showingdetails of the frame assembly.

Figure 4 is a detail view taken on line 4-; of Figure 3.

Figure 5 is a detail view taken on line 5-5 of Figure 3.

Referring now in detail to the drawings, the antenna of this inventionis shown generally by the numeral I0 and is comprised of an antennaarray characterized by having a pair of dipoles II spaced forwardly of areflector I2 and angularly adjustable relative to and carried by avertical frame I3. The frame I3 as best illustrated in Figure 3 isprovided with a pair of vertically spaced horizontal separating membersI4 and I5.

The lengths of members I4 and I5 are such as to provide for suitablespacing of the reflector I 2 from the dipoles I I. This spacing isconventionally accepted as approximately one-fourth wavelength of themean operating frequency at which the system is to operate with theantenna designed for one-half wavelength operation. The members I4 andI5 are constructed of insulating material such as wood or plastic and ofsuitable strength to support the weight of the dipoles and reflectormembers. At opposite ends of the members I4 and I5 are provided pairs I6and I! of vertical strips separating the members I4 and I5 verticallyfrom each other. The strips I6 and I I are formed of a conductingmaterial such as aluminum or like metal and are provided with oppositelyextending end portions I8 turned at right angles to the strips and boredto provide apertures I9 in which are mounted suitable bolt means 29 forangular connection thereto of the ends 2| of the dipoles and reflectormembers as best illustrated in Figure 5. The pairs of strips I6 and I1are secured to the horizontal members I4 and I5 by connecting bolts 22spaced from the angular ends of the strips,

Both the dipoles II and the reflector I2 are formed of suitable metaltubing sections 23 arranged to provide a plurality of irregulartriangular shaped cones 21 extending outwardly from the joined framemembers I4, I5, I5 and I1. The tube sections 23 are of approximately thesame length and are provided with flattened inner ends 2| bolted to thecross members with bolts 20 as previously described with their outerends 24 also flattened and bolted to vertical tube members 25 as at 26.The lengths of the vertical tube members 25- are such as to close theends of the cones 21. By closing the ends of the cones 27 by verticalsections 25 causes the dipoles to appear electrically longer, forinstance, in securing good coverage for television channel No. 2,namely, 54-60 megacycles, it would be necessary for the sides of thecone 2'! to be 46 inches in length whereas by closing the ends of thecones I have secured eflicient re- 'taining the same physical dimensionsas that of spouse in this frequency band with a cone of approximately 36inches in length. This reduction in length' or overall dimensions of thedipoles provides a more compact antenna array that will require'muchless space'for its oper ation and yet provide the same reception thatcould be attained with a much larger antenna array. This same principleholds true with the construction of my reflector [2 which is similarlyconstructed and dimensioned to provide an antenna structure having thedesired construction characteristics attained by this assemblage. In theforming of the sections 23 only sufiicient lengths need be provided toform a conical dipole response to the lowest frequency s desired.Dipoles H as Well as the reflector [2 being bolted at their inner endsto the supporting members by bolts 28 provides for angular adjustment todecrease or increase the angle at the apexes formed thereby to enablethe conical g dipols to be tilted forwardly as desired to change theelectrical pattern of the antenna with the reflector panels I2 disposedeither perpendicular to the vertical frame 13, as shown, or angu-. larlythereto as found most desirable. Such tilting forwardly of the dipolesII and the angular adjustment of reflector I2 causes the lobes formed insuch a pattern to stay in line for all of the higher frequenciesenabling the antenna to respond to the desired signals while making itpossible to eliminate undesired signals.

The reflector I2 is formed in two'parts similar to the dipoles H inorder to provide for angular adjustment relative thereto. The two partsof the reflector l2 are electrically bonded together by a bond means 28bolted across the pair of strips ll. The bond 28 functions toelectrically lengthen the reflector elements I2 with respect to thedriven elements or dipoles ll while reii) the driven elements. Thissimplifies manufacture and assembly. A twin lead 300 ohm transmissionline 29 or any suitable radio frequency transmission line is centrallyconnected to the dipoles 'II by being bonded to opposite sides of thepair of vertical strips I5 as at 30 and 3|.

The preferred mode of mounting andmuse of my antenna is to attach thedipoles H and reflector [2 to the frame I3 with the extended botmadewithin the scope of the appended claim.

I claim:'

,A television. antenna assemblage comprising a generallyrectangularsupport frame formed of upper and. lower horizontal bars formed ofnonconducting material, pairs of conducting spacer bars disposedone'pair between each end of said first named bars, outwardly projectingcars at j each end of. said spacer bars, oppositely disposed pairs ofsuperposed conical dipoles having the apex ends thereof inwardly,.mcanssecuring said apex ends to the ears of one pair of said spacers,vertically disposed connecting members connecting the outer divergentends of said dipoles together, a reflector means, means securing saidreflector means to the ears of the other pair of spacers, and aconducting connector connected between each pair of said spacers. 7

'MICHAEL D. ERCOLINO.

REFEBENGES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date D. 156,399 Baldi Dec. 13, 19492,175,253 Carter Feb. 15, 1938 2,199,050 Jenkins Apr. 30,1940 2,371,539Morch Mar. 13, 1945 2,494,665 Marshall Jan. 1'7, 1950 2,535,049 De RosaDec. 26, 1950

